Post-Quantum Cryptography (PQC) creates payloads that strain the timing and energy budgets of Personal Area Networks. In post-quantum key exchange (PQKE), this causes severe fragmentation, prolonged radio activity, and high transmission overhead on low-power devices. Prior work optimizes cryptographic computation but largely ignores communication cost. This paper separates computation and communication costs using Bluetooth Low Energy as a representative platform and validates them on real hardware. Results show communication often dominates PQKE energy, exceeding cryptographic cost. Efficient quantum-resilient pairing therefore requires coordinated protocol configuration and lower-layer optimization. This work provides developers a practical way to reason about PQC energy trade-offs and informs the evolution of PAN standards toward quantum-safe operation.

翻译：后量子密码学（PQC）产生的数据负载对个人区域网络的时序与能量预算构成压力。在后量子密钥交换（PQKE）中，这会导致严重的分组碎片化、无线活动时间延长以及低功耗设备的高传输开销。现有研究主要优化密码计算过程，却普遍忽视了通信成本。本文以低功耗蓝牙为代表平台，分离计算与通信成本，并在真实硬件上进行了验证。结果表明，PQKE 的能量消耗常以通信成本为主导，甚至超过密码计算开销。因此，实现高效的量子弹性配对需要协调的协议配置与底层优化。本研究为开发者提供了一种评估 PQC 能量权衡的实用方法，并为个人区域网络标准向量子安全运行的演进提供了参考依据。